489
Recorded events
0
Direct deaths
7
Direct injuries
$438.8M
Property damage
Hail in Adams County, Colorado: 489 recorded events between 1955 and 2025. The strongest on record measured 4.5. That places the county #94 nationally and #13 statewide for this hazard.
Decade by decade
Hail in Adams County, Colorado: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for hail in Adams County is the 2010s, when 129 of the county's 489 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Adams County archive, hail makes up 56.7% of all recorded severe weather across 7 hazard types. Nationally the county sits at #94 for this hazard and #13 within Colorado, putting it in the 97.0 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for hail in Adams County with 184 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Significant events
Deadliest on record
| Date | Location | Scale | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Jun 21, 2001 | WATKINS | 2.5 | 0 | 5 | $49.0M |
| Jul 14, 2011 | WATKINS | 4.5 | 0 | 2 | $164.8M |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jun 17, 2025 | THORNTON | 0.75 | $0 |
| Jun 17, 2025 | THORNTON | 1 | $0 |
| Jun 17, 2025 | NORTHGLENN | 1 | $0 |
| Jun 17, 2025 | NORTHGLENN | 1 | $0 |
| Jun 17, 2025 | FEDERAL HGT | 0.75 | $0 |
| Jun 17, 2025 | BARR LAKE | 1.5 | $0 |
| Jun 17, 2025 | HENDERSON | 1 | $0 |
| Jun 17, 2025 | HENDERSON | 1 | $0 |
| Jun 17, 2025 | HENDERSON | 0.75 | $0 |
| Jun 17, 2025 | HENDERSON | 1 | $0 |
Other hazards here
More from Adams County
- Tornado 192
- Thunderstorm Wind 135
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Large hail, damaging winds and very heavy rain pummeled a mobile home park in Watkins. In the park, 52 mobile homes, 14 recreational vehicles, 3 homes and a commercial building were damaged. Siding was riddled with holes and windows were broken. Vehicles sustained extensive body damage and the car windows were shattered. A handful of people were treated for minor cuts and bruises. Strong winds also flipped a tractor trailer along Interstate 70 near Watkins. At least 30 private planes at Front Range Airport were totalled. The radome protecting the National Weather Service doppler radar, which was tracking the storm, also sustained damage. The storm caused power outages which affected about 1,200 residents. Excluding the damage done at Denver International Airport, damage estimates totalled $49 million, making it the costliest storm in the last 3 years, and 10th costliest since 1984.
Quick answers
Frequently asked
How many hail events are on record in Adams County, Colorado?
489 hail events are recorded in Adams County between 1955 and 2025, causing 0 direct deaths.
What is the strongest hail recorded in Adams County?
The strongest hail on record in Adams County measured 4.5.
Where does the hail data for Adams County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Hail in Adams County, Colorado.” Severe Weather History. severeweatherhistory.com/county/colorado/adams-county/hail/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.